Disney52303

We are on the NCL Prima ending in Southampton on 8/6. Planning one overnight to see Stonehenge and fly home on 8/7. I've never been to Southampton and am overwhelmed. Does anyone know if there is a rental car terminal at the port? I've found a couple hotels nearly, some drivable and some walkable from port. Just debating a car rental or an alternate way to explore, we are a party of 4.